Synthesis, crystal structure, and structural conversion of Ni molybdate hydrate NiMoO4·nH2O

Eda, Kazuo; Kato, Yasuyuki; Ohshiro, Yu; Sugitani, Takamitu; Whittingham, M. Stanley

doi:10.1016/j.jssc.2010.04.009

Cited by 67 publications

(68 citation statements)

References 22 publications

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“…The last mass loss which occurred between 538°C and 800°C seems to be exclusively due to the carbon departure. Those water losses are in good agreement with results obtained by Rodriguez et al 43 and Eda et al 46 on their study of NiMoO4.nH2O (n = 0.75 or 1). Upon heating NiMoO4.nH2O to high temperatures in TGA-MS experiments, they also observed that water desorbs in three peaks.…”

Section: Resultssupporting

confidence: 92%

“…NiMo based catalyst precursors for deep HDS NiMoO4 may exist in several polymorphs at atmospheric pressure: the low temperature stable α-phase 41 , the high temperature stable β-phase 42 and the hydrate NiMoO4.nH2O (n=0,75, 1) phase [43][44][45][46] . According to the literature, the pure β-phase is generated by heating the α-NiMoO4 at temperatures above 690°C and is stable only if kept over 180°C 28,47 .…”

Section: Resultsmentioning

confidence: 99%

“…Recent studies give a description of the hydrated phase NiMoO4.nH2O with n = 1 or 0.75 46 . Measurements of differential thermal analysis (DTA) suggest that in these systems the metal cations have a coordination similar to that observed in β-NiMoO4.…”

Section: Resultsmentioning

confidence: 99%

“…The NiMoO4.0.75H2O structure has been described as a triclinic system (space group P-1) with tetrameric z-shaped unit of Ni octahedra, two NiO6 and two NiO5(OH2), that share edges. These units are interconnected by MoO4 tetrahedra to form a network structure with open channels 46 . NiMoO4.H2O might present a similar structure with lattice and coordination water.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Théodet

Quilfen

Martı́nez

et al. 2016

The Journal of Supercritical Fluids

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ElsevierTheodet, M.; Quilfen, C.; Martínez, C.; Aymonier, C. (2016). Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deephydrodesulfurization.Abstract: Unsupported and high specific surface area (SBET) catalyst precursors for deephydrodesulfurization (deep-HDS) are obtained using an environmental friendly, continuous and fast synthesis process in supercritical water/alcohol mixtures. This approach offers an access to high production rate and upscaling. Two mixed oxides were synthesized: NiMoO4, which is the preferred material when deep-HDS is investigating, and CoMoO4 preferred for simple HDS. The role of the water/alcohol mixture on the resulting specific surface area has been studied and allows a controlled adjustment of the resulting specific surface area. The obtained NiMoO4 material consists of the highly active hydrate NiMoO4.0.75H2O phase with a controlled composition and specific surface area up to 200 m².g -1 . Resulting materials have shown great performances when tested in deep-HDS catalytic tests.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Théodet

Quilfen

Martı́nez

et al. 2016

The Journal of Supercritical Fluids

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“…Metal molybdates and metal tungstates have attracted considerable attention for potential applications in photoluminescence, scintillators, photocatalyst hosts for lanthanideactivated lasers and humidity sensors 1,2 . Several processes have been developed over the past decade to enhance the applications of metal tungstates and metal molybdates prepared by a range of processes, such as co-precipitation 3 , a solvothermal method 4 , spray pyrolysis 5 , wet chemical method 6 , a mechanochemical method 7 , a molten salt method 8 , a hydrothermal method 9 , microwave synthesis 10 and a solid-state metathetic reaction 11 . The microwave heating is delivered to the surface of the material by radiant and/or convection heating, which is transferred to the bulk of the material via conduction 12 .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Optical Properties of BaMO4 (M = Mo, W) Particles Synthesized by Microwave-Assisted Metathetic Method

Atuchin¹,

Li²,

Lee³

et al. 2014

Asian J. Chem.

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The BaMO4 (M = Mo, W) particles have been synthesized successfully by a cyclic microwave-assisted metathetic method followed by heat-treatment. Well-crystallized BaMO4 (M = Mo, W) particles with a fine and octahedron-like morphology and the particle size of 1-2 µm have been formed after annealing at 600 ºC for 3 h. The synthesized BaMO4 (M = Mo, W) particles have been characterized by X-ray diffraction and scanning electron microscopy. The optical properties have been investigated by photoluminescence emission and Raman spectroscopy.

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MoS₂ Nanosheets Uniformly Anchored on NiMoO₄ Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

Solomon

Kohan

Mazzaro

et al. 2022

Advanced Sustainable Systems

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standard of electrolysis, such criteria are critical and still challenging. For energy storage devices, such as supercapacitors, an active catalyst capable of providing high power density and superior cycle life is a necessary condition. Pseudo capacitors exhibit very high-power density similar to that of double-layer capacitor devices. However, they differ from a double-layer capacitor because of their battery-like redox processes of the charge storage principles. Transition metal oxides (TMOs) such as NiCo 2 O 4 @NiMoO 4 , [6] NiCo-S (Fe-NiCo-S), [7] CoMxP/CC (M = Fe, Mn, and Ni), [8] and NiCoFe-P [9] have been employed as active electrocatalysts for OER and supercapacitors. Pseudocapacitive-type nanomaterials, especially TMOs or hydroxides, such as nickel oxide (NiO), [10,11] NiMoO 4 @Co (OH) 2 , [12] are widely investigated as candidates for supercapacitor applications due to their various oxidation states that contribute to the pseudo capacitance properties.Hierarchical-structured catalysts have attracted considerable attention in the field of materials for renewable energy applications. These structures can effectively increase the active surface area owing to their morphology. We recently reported the catalytic efficiency of hydrated core NiMoO 4 and shell Co 3 O 4 Hierarchical nanostructures have attracted considerable research attention due to their applications in the catalysis field. Herein, we design a versatile hierarchical nanostructure composed of NiMoO 4 nanorods surrounded by active MoS 2 nanosheets on an interconnected nickel foam substrate. The as-prepared nanostructure exhibits excellent oxygen evolution reaction performance, producing a current density of 10 mA cm −2 at an overpotential of 90 mV, in comparison with 220 mV necessary to reach a similar current density for NiMoO 4 . This behavior originates from the structural/morphological properties of the MoS 2 nanosheets, which present numerous surface-active sites and allow good contact with the electrolyte. Besides, the structures can effectively store charges, due to their unique branched network providing accessible active surface area, which facilitates intermediates adsorptions. Particularly, NiMoO 4 /MoS 2 shows a charge capacity of 358 mAhg −1 at a current of 0.5 A g −1 (230 mAhg −1 for NiMoO 4 ), thus suggesting promising applications for charge-storing devices.

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Synthesis, crystal structure, and structural conversion of Ni molybdate hydrate NiMoO4·nH2O

Cited by 67 publications

References 22 publications

Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Microstructure and Optical Properties of BaMO4 (M = Mo, W) Particles Synthesized by Microwave-Assisted Metathetic Method

MoS₂ Nanosheets Uniformly Anchored on NiMoO₄ Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

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Synthesis, crystal structure, and structural conversion of Ni molybdate hydrate NiMoO4·nH2O

Cited by 67 publications

References 22 publications

Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Microstructure and Optical Properties of BaMO4 (M = Mo, W) Particles Synthesized by Microwave-Assisted Metathetic Method

MoS2 Nanosheets Uniformly Anchored on NiMoO4 Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors

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MoS₂ Nanosheets Uniformly Anchored on NiMoO₄ Nanorods, a Highly Active Hierarchical Nanostructure Catalyst for Oxygen Evolution Reaction and Pseudo‐Capacitors